| From: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Jakub Glapa <jakub(dot)glapa(at)gmail(dot)com>, Fabio Isabettini <fisabettini(at)voipfuture(dot)com>, Arne Roland <A(dot)Roland(at)index(dot)de>, Sand Stone <sand(dot)m(dot)stone(at)gmail(dot)com>, Rick Otten <rottenwindfish(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: dsa_allocate() faliure |
| Date: | 2019-02-10 16:00:35 |
| Message-ID: | 20190210160035.GS31721@telsasoft.com |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-performance |
On Sun, Feb 10, 2019 at 12:10:52PM +0530, Robert Haas wrote:
> I think I see what's happening. At the moment the problem occurs,
> there is no btree - there is only a singleton range. So
> FreePageManagerInternal() takes the fpm->btree_depth == 0 branch and
> then ends up in the section with the comment /* Not contiguous; we
> need to initialize the btree. */. And that section, sadly, does not
> respect the 'soft' flag, so kaboom. Something like the attached might
> fix it.
I ran overnight with this patch, but all parallel processes ended up stuck in
the style of bug#15585. So that's either not the root cause, or there's a 2nd
issue.
https://www.postgresql.org/message-id/flat/15585-324ff6a93a18da46%40postgresql.org
Justin
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